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btrfs: replace waitqueue_actvie with cond_wake_up

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Use the wrappers and reduce the amount of low-level details about the
waitqueue management.

Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
David Sterba
2018-02-26 16:15:17 +01:00
parent 3d3a2e610e
commit 093258e6eb
9 changed files with 40 additions and 91 deletions
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9
fs/btrfs/inode.c
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@@ -1156,13 +1156,10 @@ static noinline void async_cow_submit(struct btrfs_work *work)
nr_pages = (async_cow->end - async_cow->start + PAGE_SIZE) >>
PAGE_SHIFT;
/*
* atomic_sub_return implies a barrier for waitqueue_active
*/
/* atomic_sub_return implies a barrier */
if (atomic_sub_return(nr_pages, &fs_info->async_delalloc_pages) <
5 * SZ_1M &&
waitqueue_active(&fs_info->async_submit_wait))
wake_up(&fs_info->async_submit_wait);
5 * SZ_1M)
cond_wake_up_nomb(&fs_info->async_submit_wait);
if (async_cow->inode)
submit_compressed_extents(async_cow->inode, async_cow);